.\" Copyright (c) 2020 Vladimir Kondratyev <wulf@FreeBSD.org>
.\"
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.Dd January 26, 2021
.Dt HSCTRL 4
.Os
.Sh NAME
.Nm hsctrl
.Nd HID system controls driver
.Sh SYNOPSIS
To compile this driver into the kernel,
place the following lines in your
kernel configuration file:
.Bd -ragged -offset indent
.Cd "device hsctrl"
.Cd "device hid"
.Cd "device hidbus"
.Cd "device hidmap"
.Cd "device evdev"
.Ed
.Pp
Alternatively, to load the driver as a
module at boot time, place the following line in
.Xr loader.conf 5 :
.Bd -literal -offset indent
hsctrl_load="YES"
.Ed
.Sh DESCRIPTION
The
.Nm
driver provides support for HID system controls most often used as
"Power off/Sleep keys" found on many keyboards.
.Pp
The
.Pa /dev/input/event*
device presents the consumer page controls as a
.Ar evdev
type device.
.Sh SYSCTL VARIABLES
The following variable is available as both
.Xr sysctl 8
variable and
.Xr loader 8
tunable:
.Bl -tag -width indent
.It Va dev.hsctrl.X.debug
Debug output level, where 0 is debugging disabled and larger values increase
debug message verbosity.
Default is 0.
.El
.Pp
It default value is set with
.Xr loader 8
tunable:
.Bl -tag -width indent
.It Va hw.hid.hsctrl.debug
.El
.Sh FILES
.Bl -tag -width /dev/input/event* -compact
.It Pa /dev/input/event*
input event device node.
.El
.Sh SEE ALSO
.Xr iichid 4 ,
.Xr usbhid 4
.Sh HISTORY
The
.Nm
driver first appeared in
.Fx 13.0 .
.Sh AUTHORS
.An -nosplit
The
.Nm
driver was written by
.An Vladimir Kondratyev Aq Mt wulf@FreeBSD.org .
